I’ve been puzzling over this since 1991 when I made a Revell model of the C130... this was an awesome animation and explained the idea in a way I could easily visualize in-flight. Thank you!
Good animation for a radio controlled aircraft application. Keep in mind that this is not the way a real aircraft (not a model aircraft) CSP Constance speed propeller) works. Real CSP needs oil pressure and a controller along with various other parts to complete the operation. Check out other channels on Constant Speed Propellers for further information.
Hi, as you saw there is a servo trying to keep the desired pitch of the prop blades. So, yes indeed, this isn't a how a CSP works. I have seen the videos. It was intended for a radio controlled aircraft. Also, this seems, as a rather stressful job for the servo to keep the desired pitch. A more sturdy mechanism is needed there. Thank you for your comment.
At 20,000+ rpm. This concept shows how this guy has no experience whatsoever. Another iPhone generation. By the way - show me thrust bearings that can work longer than 5 minutes without lubrication. Show me open thrust bearings that will go above 5,000 rpm.
Sorry for the late reply. This is a simple design really from the mechanical point of view on how to get the pitch change on the prop blades. This is achieved by a servo as you saw. I do not understand the controller part you are mentioning. If there is one, it sends a signal so the servo motor rotates the servo arm. Maybe there are other things as well connected to the controller, such as a pitot tube for the airspeed or a rpm sensor or an altimeter, so the controller contributes to a more efficient flight but all these sensors should not rotate. Forgive me if I missed something. This design is more suited towards remote controlled aircraft where smaller engines are used. No external oil supply is needed. If it is still needed in your case, I am assuming it is for the engine which again should not rotate. Again, if I am missing something please provide more info. If you're joking... good one, made me right all this for no reason. Thanks for asking.
ah please clarify, how could the variable pitch controller work when the prop is spinning but the controller and oil supply devices aren't... all systems have to spin. otherwise, it doesn't work. just wondering...
Parts seen at 0:54 are rotating, blue parts at 0:28 are rotating, while the part in the middle isn't. Notice all the bearings between the blue and middle parts. Also the bearings between it and the shaft shown just before it.
you have weak point -connection between blade and hub-i think to make this and big problem is centrifugal force of blade- for standard plastic 10x6 ,2 blade , fixed pich prop, i cut blade on segments per 1 cm to determine weight of it to be able to calculate force, it means that for that prop, at 18000 rpm centrifugal force is about 2000N, so thiny screw and same bearing would breake at this force
Thank you for you comment. This rough design is an idea of a mechanism constructed of aluminium and steel parts for a wooden prop about 25in in dia and spinning around 2500 rpm. I haven't work the math, I am thinking something like the parts of a rc heli main rotor where the main blades are attached to. Your comments are welcome.
i think to do it but forces are problem so i made some design that could be enought powerfull with ordinary materials. second problem is part of centrifugal force that pushes blades on low pitch and it is bigger as rpm rises , so must install counter weights but it starts to grow in dimensions, but i need it small. i have rc airplane with big flaps and i need variable pitch to be able for revers thrust after touch down because runway is short
@@makantahi3731 I am thinking more like a 50 -100 cc gas engine warbird airplane, where I can live with heavier stuff in my construction. Thanks for pointing out the change of pitch with more rpm. Definitely that servo alone won't be able to keep the blade pitch steady, I 'll keep that in mind. A mechanism with a leadscrew or something similar might be able to keep the pitch at the desired angle more efficiently. Thanks again for your comment.
for bigger things is easier, in shop can be found standard bearings that can hold high axial forces of blades and you can use normal size screws , for my plane it has to be about 2 mm screws, and bearings belovw10mm
Hi, you post something 14 hours ago, I should be allowed to answer within a day or two. I saw your comment the first time you wrote it, and I am still trying to figure out, which part you do mean. Please have a look in the description, the files are all available for download. If you are a Soldworks user, the animation is included in the part. If you do not how to create animations in Solidworks, you should search for tutorials on the matter. Explaining is not possible through comment posting. First of all, there is nothing flexible on that assembly. Flexible is something that is able to bend, twist etc. If you mean the part that has a ball joint, that should get from a R/C helicopter main rotor. That mechanism on the helicopter, is also capable to rotate the blades. Also, search for videos on "rc helicopter main rotor assembly". Again, to ne honest, this video is missing a lot of details on many points. My experience comes from building remote controlled airplanes and helis and this is where this video is aimed at. I hope I helped a bit.
@@johnnygritz2065 im sorry i have responded late. Can u provide me ur mail so that i can message I have some doubts regarding how that front propeller assembly rotates
Since many have asked for the design, I will soon make the file available for download. This one was created using solidworks. This one is a basic design and more detailing and improvement is needed. If someone is interested in making a working prototype, I would be happy to further help. Thank you all for your comments.
Hi, you post something 14 hours ago, I should be allowed to answer within a day or two. I saw your comment the first time you wrote it, and I am still trying to figure out, which part you do mean. Please have a look in the description, the files are all available for download. If you are a Soldworks user, the animation is included in the part. If you do not how to create animations in Solidworks, you should search for tutorials on the matter. Explaining is not possible through comment posting. First of all, there is nothing flexible on that assembly. Flexible is something that is able to bend, twist etc. If you mean the part that has a ball joint, that should get from a R/C helicopter main rotor. That mechanism on the helicopter, is also capable to rotate the blades. Also, search for videos on "rc helicopter main rotor assembly". Again, to ne honest, this video is missing a lot of details on many points. My experience comes from building remote controlled airplanes and helis and this is where this video is aimed at. I hope I helped a bit.
Hi, I don't know what happened with YT, I see double posts and I cannot find your previous comment on the ball joint so I can reply. Anyway, here's my answer. The flat part that has a hole for the ball joint, it has actually a sphere cut, NOT a cylinder cut, so the constraint is a concentric surface to surface mate. Hope this was helpful.
I’ve been puzzling over this since 1991 when I made a Revell model of the C130... this was an awesome animation and explained the idea in a way I could easily visualize in-flight. Thank you!
Thanks
Thank you! I was super curious how this mechanism worked and this explains it perfectly.
Thank you, that was the idea.
Thank you for an interesting animation
I hope it helps.
Thanks a lot , the video is really explanatory.
Good animation for a radio controlled aircraft application. Keep in mind that this is not the way a real aircraft (not a model aircraft) CSP Constance speed propeller) works. Real CSP needs oil pressure and a controller along with various other parts to complete the operation. Check out other channels on Constant Speed Propellers for further information.
Hi, as you saw there is a servo trying to keep the desired pitch of the prop blades. So, yes indeed, this isn't a how a CSP works. I have seen the videos.
It was intended for a radio controlled aircraft. Also, this seems, as a rather stressful job for the servo to keep the desired pitch. A more sturdy mechanism is needed there.
Thank you for your comment.
what program did you use for this? looks amazing! how long did it take you?
SOLIDWORKS.
After you design the parts you do the animation.
If you know what you're doing it should take several hours.
So the blue part it’s also rotating when the propeller is going at 2000+ rpm?
At 20,000+ rpm. This concept shows how this guy has no experience whatsoever. Another iPhone generation.
By the way - show me thrust bearings that can work longer than 5 minutes without lubrication. Show me open thrust bearings that will go above 5,000 rpm.
yes, the very same it's happening in helicopters swashplate
Its for helicopter, called swash plate mechanism. It can easily handle 600-800rpm.
If we put it on a plane it will turn into a suicide machine
@@AbdulMuntakim-j3nthen how should we control the angle of attack (pitch) of the propeller if we mount it on an airplane?
Any other ideas ?
what type of bearing do you use to adjust the pitch ?
Sorry for the late reply.
This is a simple design really from the mechanical point of view on how to get the pitch change on the prop blades. This is achieved by a servo as you saw.
I do not understand the controller part you are mentioning. If there is one, it sends a signal so the servo motor rotates the servo arm. Maybe there are other things as well connected to the controller, such as a pitot tube for the airspeed or a rpm sensor or an altimeter, so the controller contributes to a more efficient flight but all these sensors should not rotate. Forgive me if I missed something.
This design is more suited towards remote controlled aircraft where smaller engines are used. No external oil supply is needed. If it is still needed in your case, I am assuming it is for the engine which again should not rotate. Again, if I am missing something please provide more info. If you're joking... good one, made me right all this for no reason.
Thanks for asking.
sir can you please tell how you made that part which is flexible which makes the propeller blade rotate please sir
ah please clarify, how could the variable pitch controller work when the prop is spinning but the controller and oil supply devices aren't... all systems have to spin. otherwise, it doesn't work.
just wondering...
what oil, there is no oil, it works as on helicopter, mechanical movement of servo changes pitch through bearings and levers?
Parts seen at 0:54 are rotating, blue parts at 0:28 are rotating, while the part in the middle isn't. Notice all the bearings between the blue and middle parts. Also the bearings between it and the shaft shown just before it.
you have weak point -connection between blade and hub-i think to make this and big problem is centrifugal force of blade- for standard plastic 10x6 ,2 blade , fixed pich prop, i cut blade on segments per 1 cm to determine weight of it to be able to calculate force, it means that for that prop, at 18000 rpm centrifugal force is about 2000N, so thiny screw and same bearing would breake at this force
Thank you for you comment. This rough design is an idea of a mechanism constructed of aluminium and steel parts for a wooden prop about 25in in dia and spinning around 2500 rpm.
I haven't work the math, I am thinking something like the parts of a rc heli main rotor where the main blades are attached to. Your comments are welcome.
i think to do it but forces are problem so i made some design that could be enought powerfull with ordinary materials. second problem is part of centrifugal force that pushes blades on low pitch and it is bigger as rpm rises , so must install counter weights but it starts to grow in dimensions, but i need it small. i have rc airplane with big flaps and i need variable pitch to be able for revers thrust after touch down because runway is short
@@makantahi3731 I am thinking more like a 50 -100 cc gas engine warbird airplane, where I can live with heavier stuff in my construction. Thanks for pointing out the change of pitch with more rpm. Definitely that servo alone won't be able to keep the blade pitch steady, I 'll keep that in mind. A mechanism with a leadscrew or something similar might be able to keep the pitch at the desired angle more efficiently. Thanks again for your comment.
for bigger things is easier, in shop can be found standard bearings that can hold high axial forces of blades and you can use normal size screws , for my plane it has to be about 2 mm screws, and bearings belovw10mm
@@makantahi3731 Could you modify the tail rotor of a Heli?
I know a SolidWorks animation when I see one!
😁
SIR
CAN Y PLEASE TELL HOW U MADE THAT FLEXIBLE ROD AT FRONT WHICH ROTATES THE BLADE
Hi, you post something 14 hours ago, I should be allowed to answer within a day or two. I saw your comment the first time you wrote it, and I am still trying to figure out, which part you do mean. Please have a look in the description, the files are all available for download. If you are a Soldworks user, the animation is included in the part. If you do not how to create animations in Solidworks, you should search for tutorials on the matter. Explaining is not possible through comment posting.
First of all, there is nothing flexible on that assembly. Flexible is something that is able to bend, twist etc.
If you mean the part that has a ball joint, that should get from a R/C helicopter main rotor. That mechanism on the helicopter, is also capable to rotate the blades. Also, search for videos on "rc helicopter main rotor assembly".
Again, to ne honest, this video is missing a lot of details on many points. My experience comes from building remote controlled airplanes and helis and this is where this video is aimed at. I hope I helped a bit.
@@johnnygritz2065 sure sir, i will look on animation and thank you again
Good representation
Seen, but I need to see more and much
CAN U PLEASE GUIDE HOW TO DESIGN THAT FRONT ASSEMBLY
Do you mean the propeller assebmly?
Do you have any experience with remote control helicopters?
What exactly do you want help with?
@@johnnygritz2065 im sorry i have responded late.
Can u provide me ur mail so that i can message
I have some doubts regarding how that front propeller assembly rotates
@@johnnygritz2065 can you please make a video on how you designed the propeller or can you send me some drawing of the propeller
Since many have asked for the design, I will soon make the file available for download.
This one was created using solidworks. This one is a basic design and more detailing and improvement is needed. If someone is interested in making a working prototype, I would be happy to further help.
Thank you all for your comments.
@@johnnygritz2065 we are making a design prototype for our minor project
Hello everyone,
has anybody come with a prototype of this or willing to make one?
As outstanding as this video was, it left me wanting in terms of seeing it rotating.....😪
I hope you don't mean the blades changing pitch angle, cause they do.
If you meant the whole prop rotating... I feel bad 😔
@@johnnygritz2065 yes. I really wanted to see it rotate.
Could you please send me the drawings. Or how to draw them?
Read description please.
The mechanical one is simple than hydraulic
If possible can get the dimensions,so I can design this
This was designed in Solidworks, maybe version 2016. Do you know how to use that program?
@@johnnygritz2065 yes I know
@@johnnygritz2065 yes we know
Can you help me in add assembly constrains and animation part
@@kashyapamble1452 Hi, files are available for download in the description.
*I'd like to see this flimsy design take an 80 MPH gust!*
me too!
Also, try to make it better, it is just an idea.
Wow wow wow
Thank you, Thank you, Thank you, :)
no feather for that prop
Ha ha, sorry for that.
No se inglés
lo siento, Yo no hablo español
PLEASE SIR
AND ALSO HOW U MADE THIS ANIMATION
Hi, you post something 14 hours ago, I should be allowed to answer within a day or two. I saw your comment the first time you wrote it, and I am still trying to figure out, which part you do mean. Please have a look in the description, the files are all available for download. If you are a Soldworks user, the animation is included in the part. If you do not how to create animations in Solidworks, you should search for tutorials on the matter. Explaining is not possible through comment posting.
First of all, there is nothing flexible on that assembly. Flexible is something that is able to bend, twist etc.
If you mean the part that has a ball joint, that should get from a R/C helicopter main rotor. That mechanism on the helicopter, is also capable to rotate the blades. Also, search for videos on "rc helicopter main rotor assembly".
Again, to ne honest, this video is missing a lot of details on many points. My experience comes from building remote controlled airplanes and helis and this is where this video is aimed at. I hope I helped a bit.
@@johnnygritz2065 thank u so much sir
It really helps me a lot
Hi, I don't know what happened with YT, I see double posts and I cannot find your previous comment on the ball joint so I can reply. Anyway, here's my answer. The flat part that has a hole for the ball joint, it has actually a sphere cut, NOT a cylinder cut, so the constraint is a concentric surface to surface mate. Hope this was helpful.